First thing that comes to mind is beer spills seeping through the cracks on to your modular 
That being said, I’m trying to plan something similar. I’m thinking of something with wheels – kind of like a small cabinet, which could double as a tall desk, but that opens up with a few levels inside, at least one possible to pull out to gain better access.
There’s actually this video featuring some legendary rap producer that has, as far as I can remember, a mixing desk housed in a similar arrangement, but can’t for the life of me find the video now…